#corBrand{
    float: left;
    width: 100%;
    position: relative;
    background: #fff;
    height: 650px;
    overflow: hidden;
}
#corBrand .bg{
    position: absolute;
    top: 0;
    left: 0;
    height: 90%;
    width: 100%;
    
}
#corBrand .bg img{
    animation: 15s roll1 linear infinite normal;
}
@keyframes roll1{
    0% {
        transform: translateX(0px);
        -webkit-transform: translateX(0px);
    }
    100% {
        transform: translateX(100%);
        -webkit-transform: translateX(100%);
    }
}
#corBrand .title_nav{
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin:80px 0 50px;
    position: relative;
}
#corBrand .title_nav div{
    color: #000;
}
#corBrand .title_nav span{
    color: #8a8a8a;
}
#corBrand .brand_nav{
    width: 880px;
    margin: 0 auto;
    height: 420px;
    position: relative;
}
#corBrand .brand_nav .item{
    position: absolute;
    border-radius: 50%;
    /* background: #fcfcfc; */
}
#corBrand .brand_nav .item div{
    height: 100%;
    width: 100%;display: flex;
    overflow: hidden;
    border: 1px solid #ededed;
    border-radius: 50%;
    justify-content: center;
    box-shadow: 0 0 15px #ededed inset;
    align-items: center;
    position: relative;
    
}
#corBrand .brand_nav .item:nth-of-type(1) div,#corBrand .brand_nav .item:nth-of-type(5) div {
    -webkit-animation: bounce1 3s infinite linear; /* Safari 4+ */
    -moz-animation:    bounce1 3s infinite linear; /* Fx 5+ */
    -o-animation:      bounce1 3s infinite linear; /* Opera 12+ */
    animation:         bounce1 3s infinite linear; /* IE 10+ */
}
#corBrand .brand_nav .item:nth-of-type(2) div,#corBrand .brand_nav .item:nth-of-type(9) div {
    -webkit-animation: bounce 5s infinite linear; /* Safari 4+ */
    -moz-animation:    bounce 5s infinite linear; /* Fx 5+ */
    -o-animation:      bounce 5s infinite linear; /* Opera 12+ */
    animation:         bounce 5s infinite linear; /* IE 10+ */
}
#corBrand .brand_nav .item:nth-of-type(3) div,#corBrand .brand_nav .item:nth-of-type(8) div {
    -webkit-animation: bounce 6s infinite linear; /* Safari 4+ */
    -moz-animation:    bounce 6s infinite linear; /* Fx 5+ */
    -o-animation:      bounce 6s infinite linear; /* Opera 12+ */
    animation:         bounce 6s infinite linear; /* IE 10+ */
}
#corBrand .brand_nav .item:nth-of-type(4) div,#corBrand .brand_nav .item:nth-of-type(6) div {
    -webkit-animation: bounce 4s infinite linear; /* Safari 4+ */
    -moz-animation:    bounce 4s infinite linear; /* Fx 5+ */
    -o-animation:      bounce 4s infinite linear; /* Opera 12+ */
    animation:         bounce 4s infinite linear; /* IE 10+ */
}
#corBrand .brand_nav .item:nth-of-type(7) div{
    -webkit-animation: bounce 7s infinite linear; /* Safari 4+ */
    -moz-animation:    bounce 7s infinite linear; /* Fx 5+ */
    -o-animation:      bounce 7s infinite linear; /* Opera 12+ */
    animation:         bounce 7s infinite linear; /* IE 10+ */
}
/* #item div:nth-child(1),#item:nth-child(8){
    animation: slideTop 5s linear 0s infinite alternate;
} */
@-webkit-keyframes bounce {
    0% { top: 0; }
   50% { top: -20px; }
  100% { top: 0; }
}

@-moz-keyframes bounce {
    0% { top: 0; }
   50% { top: -20px; }
  100% { top: 0; }
}

@-o-keyframes bounce {
    0% { top: 0; }
   50% { top: -20px; }
  100% { top: 0; }
}

@keyframes bounce {
    0% { top: 0; }
   50% { top: -20px; }
  100% { top: 0; }
}
@keyframes bounce1 {
    0% { top: 0; }
   50% { top: -10px; }
  100% { top: 0; }
}
#corBrand .brand_nav .item img{
    /* height: 60%; */
    width: 60%;
    border-radius: 50%;
}

